Engine



Jan. 21, 1930. H FORD 1,744,218

ENGINE Filed April 15, l928 77 1NVENTOR- 16 19 30 W M. BY 6121M:

ELEM.

ATTORNEYS Patented Jan. 21 1930 HENRY roan, or nmnnorm, MICHIGAN,essrenonro roanmoron COMIB'ANY, or

DEARZBORN, MICHIGAN,

AOORPORATION or DELAWARE ENGINE Q Application filed April 13,

invention is to provide The object of my durable and inexpensive anengine of simple, construction.

Still a further object of my invention is to provide in connection withan internal combustion engine, means for counteracting the harmonicunbalanced inertia forces to prevent imparting vibration to the frame ofthe motor vehicle.

Still a further object of my invention is to provide a counter weightassociated with the engine which will tend to damp out the vibrations ofthe engine caused by the harmonic unbalanced inertia forces.

1 Still a further obje'ct of my invention is to provide in connectionwith an internal combustion engine a counter v weight suspended on aspring or yielding device so that a vertical plane coinciding with theresultant of the harmonic unbalanced forces, will pass through theweight, and so that this weight may be permitted vertical reciprocationto damp out the vibration which corresponds to said forces.

With these and other objects in view my invention consists in thearrangement, construction and combination of the various parts of myimproved device as described in the specification, claimed in theclaims, and illustrated in the accompanying drawings, in which-'- aFigure 1 shows an elevation of an engine constructed in accordance withmy invention, parts of the crankcase and flywheel housing being brokenaway to better illustrate the construction. a

Figure 2 shows a longitudinal vertical central sectional view throughthe crankcase of the engine. Y

Figure 3 shows a View taken at right angles through Figure 2, on theline 3-3 and Figure 4 shows an alternative form of m improved device.

Referring to the accompanying drawings, I have used the referencenumerals 10,11, 12, 13 and let to indicate the flywheel housing, thecrankcase, the oil' pan, the cylinder block, and the cylinder head of anordinary internal combustion engine of the four cylthe counterbalanceweight 19 is vertical range 1928. Serial No. 265360. I

inder type. The oil pan has a sump in the bottom thereof containing theoil 15.

A long leaf spring 16 of any suitable material has either end thereofrigidly secured to thefcrankcase in any suitable means as by rivets 17.This spring has its ends located at, or adjacent to the front and rearends of the oil pan 12, the intermediate portion of the spring beingspaced upwardly away from the floor of the oil pan 12 so as to permitvibration of the central portion of the spring as is indicated by thedotted line 18 in Figure 2. a

Secured to the center of the spring 16 is i the counterbalance 19 whichis held in place in the form of device here shown by cap screws 20 whichpass through the spring 16.-

In the form of device illustrated in Figure 4 a similar construction isused except that disposed below the oil pan 12 insteadof in the oil pan12 and in the oil 15.

The ordinary four cylinder-internal combustion engine is'such that. therotation of the crankshaft andreciprocation of the"pis-.

tons and connecting rods varies the center of gravity of these movingpartsthrough a of a predetermined amount depending on the stroke of thepistons. This reciprocation of the center of weight of these movingparts creates what is termedthe harwhich causes the engine to vibrate.With my improved device, this vibration tendency of. the engine istransmittedto the counterbalanced weight 19 which is mountedfor'yielding vertical reciprocation on the spring 16 whereby the inertiaof this counterbalance set up by the. harmonic unbalanced inertia forcesthereby making the mitted to a vehicle frame unobjectionable.

It will be noted that when the counterbalance weight 19 is mounted intheoil pan 12,

.monic unbalanced inertia force in the engine 1 weight may dampen outengine vibrations l vibration transproper weight and dimensions tocounteract the forces of any particular-engine and this exact weight hasto be determined by experimentin with different weight or counter bal- 5anced evices. For instance the counterbalance for experimental purposesmay be made of a plurality of washers bolted together and these washersmay be added to or subtracted from until the proper counterbalanceweight 10 has been determined b actual test.

Some changes may e made in the mounting of this counterbalance weightproviding it is so mounted that it is allowed recipr0- cation in avertical plane and is yieldingly 15 mounted. The dampening effect ofthis weight may be further enhanced by mounting it in such a way that anenergy absorbing or friction device may effect its movement relative tothe engine. It will be noted that this counterbalanceweight gives thebest re-. sults when rotated with its center of weight laying near theintersection of a plane bisecting a plane extending between the axis ofthe two end cylinders.

' Among the many advantages which are derived from" the use of myimproved device, it should be pointed out that this furnishes anautomatic device without any. rotating parts which tends to check thevibration imparted 3 by the engine to the frame and which will flastindefinitely. It is also cheap and economical to construct.- I v Somechanges may be made in the arrangement construction and combination ofthe va- :5 rious parts of my improved device without,

departing from the spirit of my invention and it is my intention tocover my claims such changes as mayreasonably be included within thescope thereof. o I claim as my invention:

4 1. In a device of the character described, an internal combustionengine having a crankcase, a leaf spring mounted therein adjacent to theends of said crankcase and extendin therebetween, and a weight mountedon sai s ring intermediate'of the ends thereof where y said'weight maybe mounted for vertical reciprocation within the engine; 2. In a deviceof the character described,

- 6 an internal combustion engine having a crank case, a leaf sprinlongitudinally mounted in said crank case or vertical reci rocation, aweight secured to said spring, e center of gravity of said wei htsubstantially coincidin with the path 0 the resultant of the unba ancedinertia forces of the an m.

' i FORD.

